Synthesis and characterization of lead-based metal–organic framework nano-needles for effective water splitting application

Scientific Reports, Год журнала: 2023, Номер 13(1)

Опубликована: Авг. 2, 2023

Metal organic frameworks (MOFs) are a class of porous materials characterized by robust linkages between ligands and metal ions. Metal-organic exhibit significant characteristics such as high porosity, extensive surface area, exceptional chemical stability, provided the constituent components meticulously selected. A metal-organic framework (MOF) containing lead derived from 4-aminobenzoic acid 2-carboxybenzaldehyde has been synthesized using sonochemical methodology. The crystals produced were subjected to various analytical techniques Fourier-transform infrared spectroscopy (FT-IR), Powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), energy dispersive (EDX), Brunauer-Emmett-Teller (BET), thermal analysis. BET analysis yielded results indicating area was found be 1304.27 m

Язык: Английский

---

Construction of chitosan-supported nickel cobaltite composite for efficient electrochemical capacitor and water-splitting applications

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Янв. 30, 2024

Abstract The construction of highly efficient electrode material is considerable interest, particularly for high capacitance and water-splitting applications. Herein, we present the preparation a NiCo 2 O 4 -Chitosan (NC@Chit) nanocomposite using simple hydrothermal technique designed applications in water-splitting. structure/composition NC@Chit composite was characterized different analytical methods, containing electron microscope (SEM TEM), powder X-ray diffraction (XRD). When configured as an anode material, displayed 234 345 F g −1 (@1Ag GC/NC NC@Chit, respectively) alkaline electrolyte. direct use catalyst electrocatalytic i.e., HER OER achieved overpotential 240 mV 310 at current density 10 mA cm −2 , respectively. obtained Tafel slopes were 62 71 dec respectively whereas stability durability fabricated electrodes assessed through prolonged chronoamperometry measurement constant h. electrochemical water splitting studied modified nickel cobaltite surface impedance tool, charge transfer resistances utilized to estimate activity.

Язык: Английский

---

High-performance spinel NiMn2O4 supported carbon felt for effective electrochemical conversion of ethylene glycol and hydrogen evolution applications

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Янв. 4, 2024

Abstract One of the most effective electrocatalysts for electrochemical oxidation reactions is NiMn 2 O 4 spinel oxide. Here, a 3-D porous substrate with good conductivity called carbon felt (CF) utilized. The composite -supported was prepared using facile hydrothermal method. electrode characterized by various surface and bulk analyses like powder X-ray diffraction, photon spectroscopy (XPS), Scanning transmitted electron microscopy, thermal analysis (DTA), energy dispersive (EDX), Brunauer–Emmett–Teller (BET). activity toward conversion ethylene glycol at wide range concentrations investigated. showed current density 24 mA cm −2 potential 0.5 V (vs. Ag/AgCl). Furthermore, ability hydrogen evaluation in an alkaline medium performed. Thus, achieved equal 10 overpotential 210 mV RHE), provided Tafel slope 98 dec −1 .

Язык: Английский

---

Zinc oxide–chitosan matrix for efficient electrochemical sensing of acetaminophen

Chemical Papers, Год журнала: 2024, Номер 78(5), С. 3049 - 3061

Опубликована: Фев. 1, 2024

Abstract The acetaminophen is an antipyretic and nonopioid analgesic that prescribed for the management of fever mild to moderate pain. detection by ZnO ZnO@Chitosan-modified electrodes made glassy carbon was compared. Acetaminophen detected using surfaces ZnO@Chitosan over a 10–50 µM concentration range. limits were anticipated be 0.94 0.71 μmol L −1 , respectively. In wide range acidic, neutral, basic mediums with varying pH values, impact change in solution on sensitivity investigated. Electrokinetic studies used evaluate efficiency. charge transfer resistance ( R c ) various measured electrochemical impedance spectroscopy (EIS). Using DFT studies, synergistic effect chitosan zinc oxide also shown. Forcite model calculate surface interactions between oxide. adsorption studied B3LYP density functional method. Graphical abstract

Язык: Английский

---

Nickel Metal-Organic Framework-Based Surfaces for Effective Supercapacitor Application

Journal of Inorganic and Organometallic Polymers and Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 15, 2025

Язык: Английский

---

Synthesis of nickel-sphere coated Ni-Mn layer for efficient electrochemical detection of urea

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Июнь 27, 2024

Abstract Using a trustworthy electrochemical sensor in the detection of urea real blood samples received great attention these days. A thin layer nickel-coated nickel-manganese (Ni@NiMn) is electrodeposited on glassy carbon electrode (GC) (Ni@NiMn/GC) surface and used to construct for detection. Whereas, electrodeposition considered as strong technique controllable synthesis nanoparticles. Thus, X-ray diffraction (XRD), atomic force microscope (AFM), scanning electron (SEM) techniques were characterize produced electrode. AFM SEM pictures revealed additional details about morphology, which homogenous smooth coating. Furthermore, research was carried out alkaline medium utilizing various methods, including cyclic voltammetry (CV), chronoamperometry (CA), impedance spectroscopy (EIS). The investigations showed that had good performance, high stability effective charge transfer capabilities. structural, morphological, characteristics Ni@NiMn/GC electrodes well understood using analytical techniques. limit (LOD) equal 0.0187 µM linear range 1.0–10 mM urea. examine efficiency prepared sensor. Otherwise, anti-interfering ability modified catalyst examined toward interfering species.

Язык: Английский

---

Green Synthesis of NiFe2O4 Nano-Spinel Oxide-Decorated Carbon Nanotubes for Efficient Capacitive Performance—Effect of Electrolyte Concentration

Nanomaterials, Год журнала: 2023, Номер 13(19), С. 2643 - 2643

Опубликована: Сен. 26, 2023

Energy storage applications received great attention due to environmental aspects. A green method was used prepare a composite of nickel-iron-based spinel oxide nanoparticle@CNT. The prepared materials were characterized by different analytical methods like X-ray diffraction, photon spectroscopy (XPS), scanning electron microscopy (SEM), and transmitted (TEM). synergistic effect between nickel-iron carbon nanotubes using electrochemical cyclic voltammetry (CV), galvanostatic charging/discharging (GCD), impedance (EIS). capacitances the pristine NiFe2O4 NiFe2O4@CNT studied in electrolyte concentrations. OH- concentrations for modified non-modified surfaces. Furthermore, specific capacitance estimated at wide current range (5 17 g-1). Thus, durability surfaces after 2000 cycles studied, retention as 78.8 90.1% NiFe2O4. On other hand, rate capability observed 65.1% g-1) 62.4% electrodes.

Язык: Английский

---

Synergetic effect of essential oils and calcium phosphate nanoparticles for enhancement the corrosion resistance of titanium dental implant

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Янв. 18, 2024

Abstract Calcium phosphate (CaPO 4 ) coating is one of various methods that used to modify the topography and chemistry Ti dental implant surface solve sever oral problems result from diseases, accidents, or even caries due its biocompatibility. In this work, anodized (Ti-bare) was coated by CaPO prepared amorphous calcium nanoparticles (ACP-NPs) confirmed structure X-ray diffraction (XRD) Fourier-transform infrared spectroscopy (FT-IR) techniques. Ti-bare through casting process, morphology Ti/CaPO characterized scanning electron microscope (SEM) where nano-flakes shape measured be 60 ~ 80 nm confirmed. The stability studied in a simulated saliva solution using electrochemical impedance (EIS) linear polarization techniques deduce their corrosion resistance. Furthermore, three essential oils (EO), Cumin, Thyme, Coriander, were stimulate synergistic effect with coat enhance resistance an environment. fitting EIS parameters based on Rs [R ct C]W circuit proved charge transfer (R increased 264.4, 88.2, 437.5% for respectively, at 2% concentration.

Язык: Английский

---

Controllable Synthesis of Fe2O3/Nickel Cobaltite Electrocatalyst to Enhance Oxidation of Small Molecules

Catalysts, Год журнала: 2024, Номер 14(5), С. 329 - 329

Опубликована: Май 17, 2024

Nickel-based catalysts have been widely recognized as highly promising electrocatalysts for oxidation. Herein, we designed a catalyst surface based on iron oxide electrodeposited NiCo2O4 spinel oxide. Nickel foam was used support the prepared catalysts. The modified characterized by different techniques like electron microscopy and X-ray photon spectroscopy. activity of investigated through electrochemical oxidation organic molecules such urea, ethanol, ethylene glycol. Therefore, Fe@ NiCo2O4/NF current in 1.0 M NaOH fuel concentrations reached 31.4, 27.1, 17.8 mA cm−2 glycol, respectively. Moreover, range kinetic characteristics parameters were computed, diffusion coefficient, Tafel slope, transfer coefficient. Chronoamperometry employed to assess electrode’s resistance long-term Consequently, exhibited reduction ranging from 17% 30% over continuous period 300 min.

Язык: Английский

---

Nickel Flower/Conducting Polymer Composite for Effective Ethanol Electrooxidation in Alkaline Medium

Electrocatalysis, Год журнала: 2024, Номер 15(2-3), С. 261 - 271

Опубликована: Апрель 17, 2024

Язык: Английский

---